Engineering Chemistry (BAS102) AKTU previous year questions 2022–2026
Every Engineering Chemistry question from 9 AKTU papers, tagged by unit, topic and marks. A few recent questions from each unit are listed below; open the page to filter by unit, topic or mark type.
Unit 1: Atomic Structure, Advanced Materials and Green Chemistry – AKTU PYQs
- What are nanomaterials? How are they different from bulk materials? (2 marks, 2026, Nanomaterials)
- Draw the structure of Fullerene (C60). (2 marks, 2026, Graphite and Fullerene)
- Describe the types of liquid crystals with suitable examples. (7 marks, 2026, Liquid Crystals)
- Draw and explain the Molecular Orbital (MO) diagrams of N₂ and O₂ molecules. Calculate their bond order and predict their magnetic behaviour. (7 marks, 2026, Molecular Orbital Theory)
- Compare the synthesis of Paracetamol by conventional and green chemistry routes. Which route is more environment-friendly and why? (7 marks, 2026, Green Chemistry)
Unit 2: Spectroscopic Techniques and Stereochemistry – AKTU PYQs
- A solution of concentration 1.5 x 10⁻⁴ mol/L shows absorbance of 0.6 at 400 nm in a cell of 1 cm path length. Calculate the molar extinction coefficient. (2 marks, 2026, UV Spectroscopy)
- Analyse the ¹H NMR spectra of the following compounds and predict the number of signals, their multiplicity and chemical shift values: (i) CH₃CH₂Br (ii) (CH₃)₂CHOH (7 marks, 2026, NMR Spectroscopy)
- Explain how IR spectroscopy is used to identify functional groups in organic compounds. Give at least four examples with their characteristic absorption frequencies. (7 marks, 2026, IR Spectroscopy)
- With the help of UV-Visible spectroscopy, explain why 1,3-butadiene absorbs at a longer wavelength than ethylene. What is the effect of conjugation on λmax? (7 marks, 2026, UV Spectroscopy)
- How many NMR signals are expected in each of the following compounds – CH3CH2CH2Br, CH3OCH3 (2 marks, 2025, NMR Spectroscopy)
Unit 3: Electrochemistry, Batteries, Corrosion and Engineering Materials – AKTU PYQs
- What is Plaster of Paris (POP)? Write its chemical formula. (2 marks, 2026, Cement)
- Explain the working of a Galvanic cell with a neat diagram. Also derive the expression for equilibrium constant K from cell EMF. (7 marks, 2026, Basic Electrochemistry Concepts)
- Explain the mechanism of wet corrosion of iron with the help of electrochemical theory. What are the factors affecting the rate of corrosion? (7 marks, 2026, Corrosion)
- Explain the setting and hardening of cement with relevant chemical reactions. What is the role of water in this process? (7 marks, 2026, Cement)
- Why does part of a nail inside the wood under goes corrosion explain it? (2 marks, 2025, Corrosion)
Unit 4: Water Technology and Fuels – AKTU PYQs
- What is Calgon conditioning? Write its chemical reaction. (2 marks, 2026, Water Softening Techniques)
- When does Gross Calorific Value (GCV) equal Net Calorific Value (NCV)? (2 marks, 2026, Calorific Value of Fuels)
- A sample of coal was burnt in a bomb calorimeter. The following data were obtained: Mass of coal = 0.92 g, Mass of water = 2500 g, Water equivalent of calorimeter = 600 g, Rise in temperature = 2.85°C, Percentage of hydrogen in coal = 3.2%. Calculate HCV and LCV of coal. (Latent heat of steam = 587 cal/g) (7 marks, 2026, Calorific Value of Fuels)
- Compare Ion Exchange process and Zeolite process for water softening. Under what conditions is each process preferred? (7 marks, 2026, Water Softening Techniques)
- Calculate the amount of lime (87% pure) and soda (91% pure) required to soften 1,00,000 litres of water containing: Ca(HCO₃)₂ = 32.4 mg/L, Mg(HCO₃)₂ = 29.2 mg/L, MgCl₂ = 19 mg/L, CaSO₄ = 13.6 mg/L, CO₂ = 22 mg/L. (7 marks, 2026, Water Softening Techniques)
Unit 5: Polymers and Organometallic Compounds – AKTU PYQs
- What are polymer blends? Give one example. (2 marks, 2026, Polymer Blends and Composites)
- What are conducting polymers? Explain their classification and applications with suitable examples. (7 marks, 2026, Classification of Polymers)
- Explain the preparation, properties and applications of Grignard reagent (RMgX). Write reactions of ethyl magnesium bromide with: (i) HCHO (ii) CH₃CHO (iii) (CH₃)₂CO (7 marks, 2026, Organometallic Compounds)
- Write the preparation, properties and uses of the following polymers: (i) Dacron (ii) Bakelite (iii) Nylon-6,6 (7 marks, 2026, Industrial Polymers Properties Applications)
- Ethan (C2H6) not forms polymer but ethene (C2H4) forms polymer why? (2 marks, 2025, Polymerization Processes)